Just like most soups, this Kimchi Tofu soup recipe is very versatile and can be adapted to fit both your flavour preferences and your nutritional needs.  If you prefer a subtler spiciness, substitute some of the kimchi and kimchi juice by adding in other vegetables (like napa cabbage, bok choy, or even zucchini) and more broth during the boiling step.  To add in more protein, you can use more tofu, add in canned tuna, or any sliced meat.  Kimchi  is also  made through fermentation, which produces probiotics that can be beneficial for your health.  

Link: https://seonkyounglongest.com/tuna-kimchi-jjigae/